In recent years the operator-algebraic approach (algebraic QFT) to quantum field theory has seen
many developments. A fundamental idea is that the whole quantum field model can
be recovered from the set of observables localized in an unbounded wedge-shaped
region and the spacetime translations [1]}. Conversely, a strategy to
construct models is first to obtain models localized in wedges then to prove the
existence of fully localized observables.
The most successful application of this strategy is the construction of scalar
factorizing S-matrix models in two dimensions [2]}.
